It's usually transwomen who get fired up over lesbians not sleeping with transwomen. Followed by female trans-allies.
If your daughter's FtT friend is political she may have an issue. If she is attracted to women (and in my mind, is therefore a lesbian) she may not have an issue at all.
In terms of other people. Unless your daughter is robust, I would suggest she doesn't say too much at all.
I will copy and paste a part of an interview with the transwoman where she was asked questions and answered them. She muddies the waters and none of it is logical, but it will give you an indication of what the party line is.
I've never heard of the term gender atheist, although I like it. But your daughter will need to bear in mind that it really doesn't matter what she says, anything that is even slightly off script will be jumped on.
The poster who asked the questions below is under the impression that the person who answered them (a well known transwoman), is either in denial or doesn't understand the pressure transactivists are applying.
Q: "Why is it transphobic and exclusionary for a woman born woman to claim the status of 'real woman', but it's perfectly okay for transwomen to claim the status of 'real woman'?"
A: Both cis and trans women are real women, and both are women born women. Often "real women" is code for cis women. If you use it to actually mean real women, cis or trans, go for it!
Q: "Why is it transphobic for me to proudly call myself a woman, but transwomen are allowed to proudly call themselves women?"
A: Nobody is suggusting you can't call yourself a woman if youre a woman. That's one of the things we're fighting for. Too often trans women are falsely accused of being male due to stereotypes and prejudice.
Q: "Why is it transphobic and exclusionary for women born women to say they're only attracted to certain genitals/people/sexes, but it's perfectly fine for transwomen to say they're attracted to certain genitals/people/sexes?"
A: No matter how you're trying to word it, what you're really trying to ask has nothing to do with sexes. What you're asking is "why is it wrong for a majority group to avoid or be averted to the marginalized group?" If someone tells you their sex was misidentified at birth, and you find yourself averted to them, you have internalized stuff to deal with.
What we're saying: "If you are attracted to a woman and find yourself averted to her upon learning she's trans, you most definitely have transmisogyny and transphobia to work through."
What we're not saying: "You must sleep with every trans person, past or present, whether you like it or not."
Q: "Why is refusing to sleep with someone (a woman born woman refusing a transwoman, for example) considered violence? Isn't it violent/rape culture to try to force or guilt trip someone into having sex with you?"
A: Once again, trans women are women born women. Having your sex misidentified doesnt change it. On another note, nobody is suggusting you have to sleep with anybody. But if, let's say for example, you want to sleep with a woman then find out she had her sex misidentified at birth and you now find yourself averted to her. You don't have to sleep with her, but if that's what makes you averted you may want to ask yourself why, and deal with the sterotypes you have about trans females.
Q: "Why can women born women not talk about their periods, birth, vaginas, and breasts, but transwomen can talk about their "girl dicks", "lady cocks", "clitties", and post-op vaginas?"
A: Nobody is suggusting you can't talk about them, just acknowledge women arent the only ones with those characteristics.
Q: "Why are we othering women born women by calling them menstruators, vagina havers, cisgender, pregnant people, etc, while transgender women are just called 'women'?"
A: Cisgender literally means you had your sex correctly identified at birth. Also pregnant people or any of the other terms arent referring to you personally, they're referencing that all sexes have members who share those traits. An important thing to acknowledge.
Q: "Why is it acceptable for transwomen to say violent things against women born women, disregard gendered violence, and openly state they don't care about 'cisgenders', even though women born women and young girls are raped and murdered and forced into slavery every single day, now and throughout history?"
A: I'm beginning to think you have never met a trans woman or girl in your life.
Q: "Why is it okay for transwomen to tell women born women that they aren't real women, or that transwomen are more woman than women born women?"
A: Okay, now I'm sure you never met a trans women or girl in your life. Plus, this whole time you are suggusting trans females arent real females, and now youre complaining some woman is saying cis females arent real females and now you're upset?
Q: "Why are so many people pressuring gender nonconforming folks (masculine girls, feminine boys, etc) to transition rather than realizing that any one of any gender can break stereotypes and still claim the sex they were born with?"
A: Trans girls, like any girls, can have a wide variety of interests from any gender norm, same with trans boys, and non-binary children. There is no correlation.
Q: "Why is a large portion of society okay with this new form of misogyny? Why is raising honest concerns automatically transphobic? Why is it considered feminist/revolutionary to silence women and girls?"
A: Supporting marginalized women and girls is the exact opposite of misogyny.